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431 lines
11 KiB
C
431 lines
11 KiB
C
/*
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* ADM5120 HCD (Host Controller Driver) for USB
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This file was derived from: drivers/usb/host/ohci-hub.c
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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/*-------------------------------------------------------------------------*/
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/*
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* ADM5120 Root Hub ... the nonsharable stuff
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*/
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#define dbg_port(hc, label, num, value) \
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admhc_dbg(hc, \
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"%s port%d " \
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"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
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label, num, value, \
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(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
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(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
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(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
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(value & ADMHC_PS_PESC) ? " PESC" : "", \
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(value & ADMHC_PS_CSC) ? " CSC" : "", \
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\
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(value & ADMHC_PS_LSDA) ? " LSDA" : "", \
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(value & ADMHC_PS_PPS) ? " PPS" : "", \
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(value & ADMHC_PS_PRS) ? " PRS" : "", \
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(value & ADMHC_PS_POCI) ? " POCI" : "", \
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(value & ADMHC_PS_PSS) ? " PSS" : "", \
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\
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(value & ADMHC_PS_PES) ? " PES" : "", \
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(value & ADMHC_PS_CCS) ? " CCS" : "" \
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);
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#define dbg_port_write(hc, label, num, value) \
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admhc_dbg(hc, \
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"%s port%d " \
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"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
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label, num, value, \
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(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
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(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
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(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
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(value & ADMHC_PS_PESC) ? " PESC" : "", \
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(value & ADMHC_PS_CSC) ? " CSC" : "", \
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\
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(value & ADMHC_PS_CPP) ? " CPP" : "", \
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(value & ADMHC_PS_SPP) ? " SPP" : "", \
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(value & ADMHC_PS_SPR) ? " SPR" : "", \
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(value & ADMHC_PS_CPS) ? " CPS" : "", \
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(value & ADMHC_PS_SPS) ? " SPS" : "", \
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\
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(value & ADMHC_PS_SPE) ? " SPE" : "", \
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(value & ADMHC_PS_CPE) ? " CPE" : "" \
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);
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/*-------------------------------------------------------------------------*/
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/* build "status change" packet (one or two bytes) from HC registers */
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static int
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admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
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{
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struct admhcd *ahcd = hcd_to_admhcd(hcd);
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int i, changed = 0, length = 1;
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int any_connected = 0;
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unsigned long flags;
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u32 status;
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spin_lock_irqsave(&ahcd->lock, flags);
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if (!HCD_HW_ACCESSIBLE(hcd))
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goto done;
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/* init status */
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status = admhc_read_rhdesc(ahcd);
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if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
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buf[0] = changed = 1;
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else
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buf[0] = 0;
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if (ahcd->num_ports > 7) {
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buf[1] = 0;
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length++;
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}
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/* look at each port */
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for (i = 0; i < ahcd->num_ports; i++) {
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status = admhc_read_portstatus(ahcd, i);
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/* can't autostop if ports are connected */
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any_connected |= (status & ADMHC_PS_CCS);
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if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
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| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
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changed = 1;
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if (i < 7)
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buf[0] |= 1 << (i + 1);
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else
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buf[1] |= 1 << (i - 7);
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}
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}
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if (admhc_root_hub_state_changes(ahcd, changed,
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any_connected))
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set_bit(HCD_FLAG_POLL_RH, &hcd->flags);
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else
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clear_bit(HCD_FLAG_POLL_RH, &hcd->flags);
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done:
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spin_unlock_irqrestore(&ahcd->lock, flags);
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return changed ? length : 0;
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}
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/*-------------------------------------------------------------------------*/
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static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
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{
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struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
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u32 rh = admhc_read_rhdesc(ahcd);
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u16 temp;
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desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */
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desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */
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desc->bHubContrCurrent = 0x00; /* 0mA */
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desc->bNbrPorts = ahcd->num_ports;
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temp = 1 + (ahcd->num_ports / 8);
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desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
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/* FIXME */
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temp = 0;
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if (rh & ADMHC_RH_NPS) /* no power switching? */
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temp |= 0x0002;
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if (rh & ADMHC_RH_PSM) /* per-port power switching? */
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temp |= 0x0001;
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if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */
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temp |= 0x0010;
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else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */
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temp |= 0x0008;
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desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
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/* ports removable, and usb 1.0 legacy PortPwrCtrlMask */
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desc->u.hs.DeviceRemovable[0] = 0;
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desc->u.hs.DeviceRemovable[0] = ~0;
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return 0;
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}
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static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
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{
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struct usb_hub_status *hs = (struct usb_hub_status *)buf;
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u32 t = admhc_read_rhdesc(ahcd);
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u16 status, change;
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status = 0;
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status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
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status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
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change = 0;
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change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
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change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
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hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
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hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
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return 0;
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}
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static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
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{
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struct usb_port_status *ps = (struct usb_port_status *)buf;
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u32 t = admhc_read_portstatus(ahcd, port);
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u16 status, change;
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status = 0;
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status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
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status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
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status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
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status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
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status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
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status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
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status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
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change = 0;
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change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
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change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
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change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
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change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
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change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
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ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
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ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
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return 0;
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}
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_USB_OTG
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static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
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{
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struct admhcd *ahcd = hcd_to_admhcd(hcd);
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u32 status;
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if (!port)
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return -EINVAL;
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port--;
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/* start port reset before HNP protocol times out */
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status = admhc_read_portstatus(ahcd, port);
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if (!(status & ADMHC_PS_CCS))
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return -ENODEV;
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/* khubd will finish the reset later */
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admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
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return 0;
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}
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static void start_hnp(struct admhcd *ahcd);
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#else
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#define admhc_start_port_reset NULL
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#endif
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/*-------------------------------------------------------------------------*/
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/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling,
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* not necessarily continuous ... to guard against resume signaling.
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* The short timeout is safe for non-root hubs, and is backward-compatible
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* with earlier Linux hosts.
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*/
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#ifdef CONFIG_USB_SUSPEND
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#define PORT_RESET_MSEC 50
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#else
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#define PORT_RESET_MSEC 10
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#endif
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/* this timer value might be vendor-specific ... */
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#define PORT_RESET_HW_MSEC 10
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/* wrap-aware logic morphed from <linux/jiffies.h> */
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#define tick_before(t1, t2) ((s16)(((s16)(t1)) - ((s16)(t2))) < 0)
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/* called from some task, normally khubd */
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static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
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{
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u32 t;
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admhc_vdbg(ahcd, "reset port%d\n", port);
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t = admhc_read_portstatus(ahcd, port);
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if (!(t & ADMHC_PS_CCS))
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return -ENODEV;
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admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
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mdelay(10);
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admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
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mdelay(100);
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return 0;
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}
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static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
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{
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u32 t;
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admhc_vdbg(ahcd, "enable port%d\n", port);
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t = admhc_read_portstatus(ahcd, port);
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if (!(t & ADMHC_PS_CCS))
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return -ENODEV;
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admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
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return 0;
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}
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static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
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{
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u32 t;
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admhc_vdbg(ahcd, "disable port%d\n", port);
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t = admhc_read_portstatus(ahcd, port);
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if (!(t & ADMHC_PS_CCS))
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return -ENODEV;
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admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
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return 0;
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}
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static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
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u32 val)
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{
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#ifdef ADMHC_VERBOSE_DEBUG
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dbg_port_write(ahcd, "write", port, val);
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#endif
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admhc_write_portstatus(ahcd, port, val);
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return 0;
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}
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static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
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u16 wIndex, char *buf, u16 wLength)
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{
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struct admhcd *ahcd = hcd_to_admhcd(hcd);
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int ports = ahcd->num_ports;
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int ret = 0;
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if (unlikely(!HCD_HW_ACCESSIBLE(hcd)))
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return -ESHUTDOWN;
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switch (typeReq) {
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case ClearHubFeature:
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switch (wValue) {
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case C_HUB_OVER_CURRENT:
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#if 0 /* FIXME */
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admhc_writel(ahcd, ADMHC_RH_OCIC,
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&ahcd->regs->roothub.status);
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#endif
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case C_HUB_LOCAL_POWER:
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break;
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default:
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goto error;
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}
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break;
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case ClearPortFeature:
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if (!wIndex || wIndex > ports)
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goto error;
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wIndex--;
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switch (wValue) {
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case USB_PORT_FEAT_ENABLE:
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ret = admhc_port_disable(ahcd, wIndex);
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break;
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case USB_PORT_FEAT_SUSPEND:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
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break;
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case USB_PORT_FEAT_POWER:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
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break;
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case USB_PORT_FEAT_C_CONNECTION:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
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break;
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case USB_PORT_FEAT_C_ENABLE:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
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break;
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case USB_PORT_FEAT_C_SUSPEND:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
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break;
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case USB_PORT_FEAT_C_OVER_CURRENT:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
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break;
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case USB_PORT_FEAT_C_RESET:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
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break;
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default:
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goto error;
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}
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break;
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case GetHubDescriptor:
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ret = admhc_get_hub_descriptor(ahcd, buf);
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break;
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case GetHubStatus:
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ret = admhc_get_hub_status(ahcd, buf);
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break;
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case GetPortStatus:
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if (!wIndex || wIndex > ports)
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goto error;
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wIndex--;
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ret = admhc_get_port_status(ahcd, wIndex, buf);
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break;
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case SetHubFeature:
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switch (wValue) {
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case C_HUB_OVER_CURRENT:
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/* FIXME: this can be cleared, yes? */
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case C_HUB_LOCAL_POWER:
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break;
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default:
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goto error;
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}
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break;
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case SetPortFeature:
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if (!wIndex || wIndex > ports)
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goto error;
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wIndex--;
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switch (wValue) {
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case USB_PORT_FEAT_ENABLE:
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ret = admhc_port_enable(ahcd, wIndex);
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break;
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case USB_PORT_FEAT_RESET:
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ret = admhc_port_reset(ahcd, wIndex);
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break;
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case USB_PORT_FEAT_SUSPEND:
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#ifdef CONFIG_USB_OTG
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if (hcd->self.otg_port == (wIndex + 1)
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&& hcd->self.b_hnp_enable)
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start_hnp(ahcd);
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else
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#endif
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
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break;
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case USB_PORT_FEAT_POWER:
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ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
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break;
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default:
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goto error;
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}
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break;
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default:
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error:
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/* "protocol stall" on error */
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ret = -EPIPE;
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}
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return ret;
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}
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